If power is not reaching any of the coil-on-plugs or ignition coil packs, you'll get a bonafide ‘no spark no-start condition’.Check that power is reaching the coil packs or ignition coil-on-plug coils.Now, with no spark in any of the engine cylinders, this what I would suggest: The next step is to make sure that you do have fuel pressure with a fuel pressure gauge just to make sure the fuel pump is not a secondary issue. Go to: No Start 2: Checking Fuel.ĬASE 2: Spark was NOT present in all of the cylinders. Your next step is to verify fuel pressure and that the PCM is activating the fuel injectors with a Noid light. This result tells you one very important thing: the crankshaft (crank) sensor is functioning correctly and you don't have to spend any time testing it or any money replacing it.

Here are the most common causes of a no spark result:ĬASE 1: Spark was present in all of the cylinders. The idea behind checking for spark is to see if all of the 8 engine cylinders are getting spark. As mentioned before, usually one of them will be missing from the mix. Both of these tests should be done simultaneously if possible. The very first thing you need to do is check for spark and the presence of fuel.

2005 expedition fuel pump circuit